Nexus evidence Chemistry

Stage 1. Stoichiometry in chemical equation

Reactants

Chemical reaction

Classification of chemical reactions

Products

STAGE 1

Factors the rate of a chemical reacton.

chemical ecuation

ENDOTHERMIC

EXOTHERMMIC

Balanced chemical ecuations.

Evidence of chemical equation

and others...

matter is neither vcreated not destroyed, the atoms of reactants build the products, this rule is fulfilled known as balancing ecuations.

Blancing equation by the trial method:

• Activation energy. minimum amount of energy required to break bond
• Heat of reaction. amount of energy that is released when a chemical reaction occurs.
• SYNTHESIS REACTION
• DECOMPOSITION REACTION
• SINGLE DISPLACEMENT
• DOUBLE DISPLACEMENT

Reaction that require energy to be carried out.

what is a chemical reaction?

is chemical change, where substances react to form new substances with differents propierties and compositions that the original one.

Reactant: They are the initial substances involved in a chemical reaction.

what is a product?

Product. they arte the substances that result from the combination of the reactants.

• - The bonds betwwen the atoms of readctants are broken, which form bew bonds to give rise to the products.
• Reaction speed. Reaction rate: change in concentration/ change in time

Reaction that release energy in the form of light and heat.

Factors influencing the rate of a chemical reaction.

• The division of particles
• Nature
• Concentration
• Temperature
• Catalysts
• Inhibitor

TRIAL METHOD

An example: CH4 + O2 ---> CO2 + H2O reactants products CH4 + O2 ----> CO2 + H2O C: 1 C.1 H:4 H:4 O:2 O:2

What is a chemical ecuation?

A equation is repressented by the formulas of the rectants located on the left and ond the right side the products, chemical equation is where the substances involved. Is the change that matter presents. The equation can include symbology like: (s), (l), (aq), (g)